<nav class="admin-header navbar navbar-dark bg-dark">
  <a class="navbar-brand mb-0 h1" href="{{ 'index'|adminUrl }}">
    {{ adminSite.siteHeader }}
  </a>
  {% if request.user %}
    <form action="{{ 'logout'|adminUrl }}" method="POST">
      <button type="submit" class="admin-header__logout">Logout</button>
    </form>
  {% endif %}
</nav>
